STS study of the CMR effect of a manganite thin film in an external magnetic field - Condensed Matter > Strongly Correlated ElectronsReportar como inadecuado




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Abstract: A La0.75Ca0.25MnO3-film grown by metalorganic aerosol deposition techniquewas investigated by scanning tunnelling microscopy and spectroscopy. A smallspot was found on the surface which exhibits the expected magnetic fielddependence of the tunnelling conductivity giving the opportunity for a localspectroscopic study of the intrinsic colossal magnetoresistance CMR behavior.The tunnelling conductivity is strongly enhanced in an external magnetic fieldof 4 T and the CMR behavior can be interpreted in terms of a redistribution ofoccupied electronic states torwards the Fermi energy.



Autor: B. Damaschke, T. Mildner, V. Moshnyaga, K. Samwer

Fuente: https://arxiv.org/







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